Impulse-sending mechanism.



IMU'LBE SEEDING MBUHANISM.

v.AHLIAT10N FILED DEQ.. 19, 1913.

'1,127,050.; meme@ Fen. 2, 1915.

/ 5 SHEETS-SHEET 1.

am. i n

@j A'f/y VMT/'125555.

F. R. MGBERTY L A. H. ADAMS.

4 IMPULSE SENDING MEGHANISM.

APPLICATION FILED DBG.I9,1913.

1,127,050'. .Patented 2, 1915.

5v SHEETS-SHEET 2 `P. R. 'MGBBRTY a: VA. H. ADAMS. I-MPULSB SBNDINGMBGHANISM. APPLICATION FILED 1330.19, m13.

,127,050. Patented Feb. 2, 1915.

5 SHEETS-SHEET 3 Arf/114k /7 Adams by A//y P. R. MOBBRTY & A. H. ADAMS.

IMPULSB mmm@ MBCHANISM.

APPLICATION FILED DEC. 19, 1913. 1,127,050, Patented Feb..2, 1915.

' of parts in such a mannerv that the impulses produced by the mechanismmay he eX-y BELGIUM, issie-None To wasir'n CORPORATION or riattivare.

License.

Specific-atten ai Letters Patent.

eine encres, or BRUSSELS,

Application niet?. fdeceiiitxer i9, 1313. Serial No. 892mg.'

To all whom fit'magz/ concern.'

Be it known that We, FRANit "ftonue'i"'lilo-A 'BERTY and ARTHUR; HERMANADAM-s, citizens of the' UnitedStates, residingat 49 Boulevard Leopold,Antwerp, Belgiunnand 34 Rue de Comines, Brussels, Eelgiuin,respectively, -liaveinvented certain neuv and useful Improvements inImpulse-Sending Mechanisms, ot which the following 'is full.l clear',concise, and exact descriptioni This inventionrelates to impulsefsendingmechanisms 'and particularly to sendingv mechanisms of the character'generally known as finger Wheels used in telephone ef;- chanee systems,iyherein automatic switches extend-a connectionto a. desired line under`the control of impulses initiated vvor sent from a subscriberssubstation y vThis invention has'for its object to provide -an improvedand novel structure ot impulse sending mechanism or finger Wheel wherebyunder the'manual controlof a call` ing subscriber the necessarycontrolling inif pulses may be produced or sent in an accurate andeiiicieiit manner.

One of the features of the invention has to do Awith an impulsemechanism wherein the duration of the controllingF impulses` having oncebeen determined, will be Wholly independent of the rate of movement ofthe driving portions ot the mechanism and iiidependentv of any externalinterference with the normal operation ot such mechanism,

Another .feature ot Athe .invention has to -do With the construction andVarraiiireinent tremely short, ivhile at the saine time proriding meansiv-lieireby such impulses may Avthe device.

Patented Feb. 2', 1915.

ment of parts by which a simple yand eii cient impulse mechanismcomprised of but few and relatively simple parts may' be.producedivithout detracting from the efficiency and accuracy thereof,noi in any l'Way add-1 ing complexities tothe operation .of suchmechanism by the subscriber.. l l 'i Other features of the inventionwill sufings of lWhicli- Figure lis a front vieiv of an impulseproducing` vmechanism or nger Wheel em' bodying the invention with apart of the manually controllable finger disk and. also a portion of theiiiclosing case broken away to show more clearly the essential elementsandthe interrupter controlled by it, together vvith the' circuitconnections ofthe device.

3 isa horizontal section of the device las shoivn in Fig. l upon theline Fig. ji is a vertical section of the deviceas shown in Fig. 'l uponthe line Fig. 5 is a lpeispective viev: of the device with portions ofthe inger dish and the iiiclosiiig case iemoved. Fig. 6 is a detail ofthe interrupter and the star vvheel cont-roliing lthe saine. Figs. '7,8, 9, and l0 are detail vieivs 'show ing;- the position of the carrierand Contact.

`iciently appear from the detailed descrip- 'tion herein, 'ash embodiedin the construe-. tion set` iorth in the accompanying drawof the device.Fig. 2 is a front view of .the device With a number of the partsremoved-- to show clearly the relation of the star Wheel spring, atdifferent steps in theA operationxof f casing shattmti. :it the -lirontof `this shaft 33 carries at its centena' hollOivi:`

mounted-a finger-disk 'll having va pluralityfj` ot lholes therein, asshown. This finger-disk ll may be moved about its center in a clock--wise direction and when released, will re- -turn to its normal positionunder the in,-

viiueiice of a spring l5.

lVithin the casing, and mounted on the shaft l36 is a hub A34l araotcliet Wheel 22 which coperates Witl -ioo Pivotally mounted to thebottom of they-.1' 'casing is a carrier QT carrying nienibeis the dos'pivoted to the casing'.

and 30, which coperale with Contact cuit. .s `will be hereinafterdescribed.

-Fzistened to the inner side of the nger-I lu vine' mounted thereon asta r- `Wheel/2l and 231 and S2 to maxe and break a cii'- f ment of thestar Wheel.

' 20, and when aiskn 'is mmber 17 which mais a as inner end a cam platev16; to the cam plateA 16 is fastened a spring member 18 which .has ptdto engage 'a clockwisefdi rection, the depression 19 slips over theteeth the finger wheel is released vto lreturn to its; normal positionthe depression 19 contacts with'fa-rtooth 20, movingjthestar'. teeth ofthe star wheel. This stud 26 is car- Wheel, 21 in a counter-clockwisedirection, as vvill'behereinafter described. Fastened to the cas-ing isa-.sprin fstop' member 28 with which a hook 24. on t efcam member 16contacts to limit the counter .clockwise move- The star Wheel 21 alwaysmoves in 'a' counter clockwise direc tion and is held against a returnmovement by means of av stop 35 which places. itself behindeach'tooth 2Oof the star wheel as it l moves past suci stop.

.spiral spring 15.

In devicesvo ,this character the subscriber l moves the disk 11l in aclockwise direction until the opening therein, 12 for example,corresponding to the first digit of the number desired has been broughtadjacent to theA stop 13 'and then releases such disk to allovv it toreturnfto its normal position. This operation is accomplished by simplyinserting -the lfinger into the proper hole and rotating the disk in aclockwise direction until the linger strikes upon the stop 13 when, byremoving the fingenfrom the hole, the disk vvill be restored to normalin a counter-clock- Wise direction by Lpower suppliedl by the Themovement of the fingerdisk in the clockwise direction is an idlemovement, noelectrical changes being produced andfno mechanical changesother than the winding up of the spring 15. lith this movement of thedisk, however, the

plate 1G, -carried by an arm 17, fastened to the' disk 11, has beenmoved with said disk and a spring 18 carried yby said plate and providedwith atoothy 19 has passed by a number of teeth 'Q0 lon the star wheel21 correspondin(r to the digit indicated by the snif scriber.inmediately upon the release of the finger disk by the subscriber suchdisk will start in its restoring movement and the 'tooth 19 engagingwith a tooth Q0 upon the star wheel 21, causes such star 'wheel to bemoved in a counter-clockwise direction along with the linger disk.

The star wheel has associated thereivitzi a simple escapement mechanismcomprising the toothed ivheely 22 and the vibrating dog This dog 23 hasconsiderable inertia. and the movement of the star Wheel ivi'tl. thelinger disk 'in the reverse movement of such disk is, to a certainextent, impeded 1n the .ellknown manner".` The reverse Aorcounterclockvvise movement'oic the finger disk. end, therewith. of thestar Wheel, will continue until, as the finger disk comes into itsnormal position, the hook 24 on the plate 16 'en gages the spring 28;This engagement bringsl the finger disk to rest and the entire device isagain in normal'condition ready for asubs'equent operation.

In the normal conditioniof the device,l regardless of the particularposition in which the star wheel maybe at such time, the stud 26 will.be resting u'pon the top of one of the ried by a pivoted segmentalcarrier 27 carrier 27y is held inits normal position with the -stud 2Gyin contact with a tooth 20 of the star lwheel by the spring 34.Contained Within the segmental portion 27 and also pivoted upon thescrew 28 is an arm of insulation 3Q which is adapted to move Within thelimits set by the portion of insulation 29 and a continuation of thestud 26. Coperating with the portion of insulation Q9 and the arm ofinsulation 30 are the contact springs 31, 32 mounted upon and insulatedfrom the casing 33 of the device. These contact` springs 31, 32, formthe terminals of the circuit in which the impulses (circuitinterruptions) are to be produced by the operation of the device by thesubscriber.

In the movement of the star ivheel, as the tooth 20 on which the stud:26 y'rests moves from under such stud the carrier 27 is moved about itspivot to the right as shown in Fig. 1 under the influence of the spring3. In this movement of the carrier the circuit between the springs 31,32, which is normally closed, will be immediately opened, but will beagain lclosed when the stud reaches its extreme position under the'inluence of the spring As the'next succeeding tooth 20 of the starWheel comes in contact with the stud QG, the stud and the carrier 2Tivill be moved against the iniiuence of the spring 3i until it againrests upon-the top of toc-th In this return n'icvement of the stud andcarrier the circuit betieen the springs 31, 32, will not be opened.Referring specifically to Figs. 7, S, 9 and 10, this operation ol' theinterrupter device may be clearly understood. When the stud Q6 restsupon the top of the tooth Q0 of the star Wheel the interrupter deviceand the contact springs ivill'be shown in Fig. T. As thetooth Q0 movesfrfm under the stud 26 the parts oi the interrupter device ivill bemoved under the influence ot' the spring 3lan'd will, in

such movement, cause the interruption ci the circuit between the springsas illuscooperating therewith'A ey-the :nextsubsequent tooth' 20 of thestar wheel, the parts will be returned to positions iis-shown in-Fig. 7,but no interruption of the circuit between the springs 31, 32, will takeplace for the reason that V`the arm ofinsulation BOsnpporting the spring32 will maintain 'the circuit closed until when the lportion ofinsulation 29 presses thereagainst it 1s moved .from under such spring32, at which time, however, the portion 29 will support the spring 32,thereby preventing any opening of the circuit.' This action of .theparts whereby the circuit is maintained, as the stud 26 rises upon asubsequent tooth 2O of the star wheel, is clearly illustrated in Fig.'1(It will therefore be'seen that, due to the movement ofthe star wheel,the distance'uof one tooth has caused a singleinterruption of thecircuit, such interruption being exceedingly short but capable of beingaccurately timed by the adjustment of the tension of the spring 34. Theinterruption ofthe circuit takes place only when the stud 26 is droppingfrom the position in which it' is supported by a tooth 20 tothe lowestposition vof which it'is capable of taking underthe influence of thespring 34. When the stud is in either of its extreme positions, or whenit is being lrestored from its lowest. position to its position resting`u'pon a tooth 2O of the star wheel, the circuit of the springs 31, 32,is at all times closed. A

As the finger disk 11 is about to come into itsl normal position, thatis, after all but one of the impulses have 'been produced, and as thestud 26 drops for the last time in this operation from the tooth 2O itis prevented from movingto the full extent of its usual movement by theplate 16, being stopped by such plate in'suchposition that the partsofthe interrupter device and the Asprings 31, 32, remain in thepositions indicatedA in Fig. 8 until, as the star wheel is again broughtto rest, it rides up upon the subsequent tooth 20. This last currentimpulsetherefore is measured by the time it takes the star wheel to movean angular distance between two of the teeth 20. This impulse, althoughit-may be relatively short, isma'terially longer than the impulsesproduced in the manner hereinbefore described. The operation of thefinger disk, therefore, has for any given-digit desired to be sent bysuch operation produced-a definite number of impulses corresponding tosuch digit, all of such impulses except the last one being short and ofa certain definite duration, whereas, the last impulse is a materiallylonger impulse.

A convenient way to adjust the tension of the spring 3,4, in order toget the produced impulses of proper duration by the normal operation ofthe interruptor device 1s to have such spring extend `beyond -the casing33,

which is longer than the remainder. 110

- open the contact and a definite interval thereplace weights upon suchfspring until/j 'theet proper tensionis obtained, when the sprin may bevfastened* by the means shown, .an the portion extending beyond thecasing cnt, oi.

We claim:-\- 'f 1. Inan impulse sender for automatic telephoneexchanges, the combination with an electrical contact, ofv aspringpressed :actuatlngarm therefor, a manually operated 'memberadapted to actuate said arm, said member determining the number ofactuations and the intervals-between actuations, and said spring-pressedarm the duration of such actuations. 2.- ln an impulse sender forautomatic telephone exchanges, the combination with an electricalcontact, of a toothed wheel, a iinger disk adapted to be variablyoperated to set the same, a spring-pressed actuator for said Contactadapted to be operated by said Wheel once for each movement thereof thepitch of one tooth and constructed and arranged so that the duration ofthe movement )during which said actuator actuates said contact, isindependentof the displacementof said teeth and of the rate of rotationof the wheel. 3. In an impulse sender, the combination with a toothedwheel, of an electrical contact, any actuator comprising a pivotedspring-pressed member riding upon the periphery of said wheel andcarrying two msulated parts one fixed to said member and the otherpivoted to move independently therewith, whereby each tooth of thewheel'first permits theI irst ofsaid parts to move to open the contactand a definite interval thereafter causes the second to close the same.

4. I n an impulse sender, the combination with an electrical contact, ofa toothed wheel, and means operated by said wheel for causing saidcontact to be actuated a number of times all of the same duration exceptthe last 5. In an impulse sender, the combination with a toothed wheel,of an electrical contact, an actuator comprising a pivotedspring-pressed member riding upon the peripheryfof said wheel andcarrying two insulated parts one fixed to said member and the otherpivoted to move independently therewith, whereby each tooth of the wheeliirst other pivoted to move independently therewith, whereby each toothof the wheel firstV permits the first of said parts to move to open theContact and al definite interval thereafter causes the second to closethe same, and blocking means inserted between two of the teeth adaptedto hold the actuator in such an intermediate position while the wheel ismoving between said two teeth A10 that said Contact is maintained openvwhile such actuator is riding upon said blocking means.

